JPH0627209Y2 - Pusher handling device for indirect extrusion press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pusher handling device for an indirect extrusion press, which makes it possible to freely select repeated continuous use or exchange use of the pusher.

(Prior Art) In an indirect extrusion press, it is well known that a press plate (dummy block) is interposed between a pressure stem and a billet (metal material) formed by extrusion of the stem to perform extrusion molding. Yes, but with only one pusher,
That is, as a technique of repeatedly using the same pusher continuously, there is one disclosed in Japanese Patent Laid-Open No. 60-227918.

That is, the indirect extrusion press according to the related art is provided with a pressure stem or an stem and a piercing mandrel which are arranged to move back and forth along one of the extrusion centers on one of the opposing frames (platens) and the other. Between the die stem, the pressure stem and the die stem, a container that is also arranged to move back and forth along the extrusion center, and between the extrusion center position and the extrusion center retreat position in the press machine between the container and the pressure stem. A pusher loader that has a clamp means for reciprocating a pusher and moves along the extrusion axis integrally with the container, and a raft cutting means that is arranged so as to accompany the container, and after the completion of extrusion, As the container moves forward, the press plate and the cake are exposed to the rear end side of the container and only the press plate is held by the press plate loader, and the cutting is performed by the cutter cutting means. In the middle of the operation, the cutting means precedes the lees and separates it from the lees by pressing it against the lees loader, or withdraws the lees loader to a position outside the center of extrusion. By separating the joint between the pusher held by the loader and the meal and separating the pusher separated from the rear meal to the extrusion center retracted position, one pusher can be used repeatedly and repeatedly. It is what

(Problems to be solved by the invention) However, just by repeatedly using one pusher repeatedly like the above-mentioned conventional technique, the temperature of the pusher abnormally rises due to the continuous use. The press must be temporarily stopped for cooling, inspection, and repair of the press. In addition, in that case, there is a problem from the viewpoint of safety in that it is necessary to enter the press machine, and further,
Repeated use of only one pusher may not be preferable in terms of durability of the pusher.

The present invention has been made in view of the above problems, and an object thereof is to circulate a plurality of pushers in a pusher transfer mechanism so that each press work can be replaced and used. Or indirect extrusion that enables the most appropriate replacement of the press platen depending on the press work conditions, such as replacement every few cycles, and at the same time eliminates the need for temporary stop of the press machine and entry work in the press machine. It is to provide a press handling device for a press.

(Means for Solving the Problem) In the present invention, in order to achieve the above object, the following technical means were taken.

That is, according to the present invention, a container 2 that can be moved back and forth between the stems 4 and 5 facing each other, a container holder 3 that supports the container 2, and a billet 11 inside the container 2.
In the press between the container 2 and the pressurizing stem 5, the billet loader 12 reciprocally movable between the extrusion center position and the extrusion center retreat position, and the extrusion center position and the extrusion center retreat position. Pusher 10 that reciprocates between and
In an indirect extrusion press having a pressing plate loader 14 which has the clamping means and moves integrally with the container 2 along the extrusion axis, and a raft cutting shear 9, it is taken out in the anti-extrusion direction after extrusion molding. Transfer passages 17, 18 for receiving the pusher 10 via the pusher loader 14 and unloading the pusher 10 to one side outside the press machine are provided, and are arranged on the other side outside the press machine. A transfer passage 20 extending across the press machine from one side to the other side is provided for supplying the discharged pusher 10 to the billet loader 12, and the transfer passage 18 or the transfer passage 20 is provided. In the middle of the outside of the press machine, the pusher path switching means C is provided which can be selectively selected depending on whether the path of the pusher 10 goes to the billet loader 12 side or the pusher storage bucket 26 side. It is characterized by being deployed.

(Operation) According to the present invention, as shown in FIG. 3, the pusher 10 taken out in the direction opposite to the extrusion direction after the extrusion molding is received by the pusher loader 14 and once pressed through the transfer passages 17 and 18. The billet loader 12 is carried out to one side outside and is transferred to a billet loader 12 arranged on the other side outside the press machine through a transfer passage 20 extending across the press machine to supply the billet 11. Since it is supplied to the billet loader 12 at the same time, it is possible to
10 can be circulated and used. That is, the pressing plate 10 is not only cooled during the circulation, but also the pressing plate 10 suitable for press working conditions such as replacement of the pressing plate 10 every press cycle or replacement of every several cycles. 10 exchanges can be used.

Further, since the pusher path switching means C is provided in the transfer passage 18 or the transfer passage 20 outside the press machine, when the pusher 10 is to be inspected or repaired, the switch means C is pushed. When it is aligned with the storage bucket 26 side, the pusher plate 10 can be automatically collected in the storage bucket 26 provided outside the press machine.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In the figure, F indicates an indirect extrusion press, which has a counter frame 1 to which a cylindrical die stem 4 is attached at the extrusion center (press axis) and a pressure stem 5 at the extrusion center via a crosshead 8. The counter frame 1 is erected on the floor so as to face the front and rear with a frame (not shown).
In this example, which is arranged diagonally, the frame and the frame (not shown) are rigidly connected to each other through four columns 1a to form a frame frame structure having a rigid frame structure.

Between the counter frame 1 and a frame (not shown),
A container device mainly composed of a container 2 in which a billet accommodating chamber 2b is formed and a container holder 3 fitted in and supporting the container 2 is provided, and the billet accommodating chamber 2b is concentric with the extrusion center. It is penetrated back and forth.

Reference numeral 6 is a piercing mandrel, which is mounted in the pressure stem 5 via a mandrel holder 7 attached to the crosshead 8, and 9 is a raft cutting shear that cuts the raft 2a after extrusion molding. It is deployed on the upper rear side of the. Further, 10 is a pusher, 11 is a billet (metal material), and 13 is a die attached to the tip of the die stem 4.

Reference numeral 12 denotes a billet loader for supplying the billet 11 to the billet storage chamber 2b of the container 2, and as shown in FIGS. 1 and 2, the final retracted position of the container 2 via a swivel axis 30 parallel to the extrusion direction. The billet 11 supplied from the chute 23 is carried to the center of extrusion by the turning.

Reference numeral 14 denotes a pusher loader, which is attached to the peripheral side of the container holder 3 at the rear end of the arm-shaped main body 14b.
It is attached to one end of a loader swivel shaft 15 which is mounted on the above. The forward / reverse rotation cylinder 34 is connected to one end side of the turning shaft 15 via a link 35, and the advancing / retreating cylinder 16 is connected to the other end side, so that the pusher loader 14 is It is possible to rotate forward and backward between the extrusion center position and the extrusion center retreat position shown in FIG. 2 and to move forward and backward with respect to the container 2 in the extrusion direction. Further, a pusher gripping part 14a is formed at the front end of the arm-shaped main body 14b, and a clamp 25 corresponding to the gripping part 14a is provided via a pivot 32 and an opening / closing cylinder 33 to freely open and close the pusher 10. Has become.

T is a pusher transfer mechanism, and in this embodiment, transfer passages 17 and 18, pusher path switching means C, lifter 19, transfer passage 2
It consists of 0 and elevator 21.

The transfer passage (pusher chute 17) is taken out to the extrusion center retreat position by the pusher loader 14 after the extrusion molding, and then receives the unclamped pusher 10 and transfers it to the next transfer passage 18
Is provided on the rear end side of the container holder 3 and accompanies the container 2 together. This pusher shoot 17
Has a gutter-shaped cross section to allow the pusher 10 to roll in a standing posture, is inclined at an appropriate downward slope toward the outside of the press, and is formed on the container holder 3 as shown in FIG. It is provided on the rear side (on the side opposite to the extrusion direction) of the falling hole 24 while avoiding the falling hole 24.

The transfer passage 18 is attached to the press floor board 27 at a position where it communicates with the pusher chute 17 when the container 2 reaches the most retracted position, and has a gutter-shaped cross section similar to the pusher chute 17. ing.

Pusher path switching means C is installed outside the transfer passage 18 and outside the press (that is, outside the floor board 27). The switching means C is a forward / backward movement cylinder 36 provided outside the floor 27.
And a base 38 that slides along the press axis via a slide guide 37, and two switching passages 28 and 29 having a gutter-shaped cross section provided on the base 38. Either one of the two switching passages 28 and 29 communicates with the transfer passage 18 by moving in and out, and the path of the pusher plate 10 can be switched. A pusher storage bucket 26 and a lifter 19 are provided at the tip of each switching passage 28, 29 (outside the press machine).

The lifter 19 is a transfer passage for the pusher 10 coming from the passage 28.
It is for handing over to the 20, and the transfer hole of the pusher 10 on the side
It comprises a tower 39 having 39a, a lift 41 having a pusher platform 40 installed inside the tower 39, and an elevating cylinder 42 for elevating the lift 41.

The transfer passage 20 has a gutter-shaped cross section, and one end of the transfer passage 20 communicates with the outflow hole 43 of the tower 39. The transfer passage 20 traverses below the press floor 27 and is inclined downward toward the billet loader 12 side.
The other end communicates with the transfer hole 44 on the elevator 21 side.

Inside the elevator 21, a lifting rope 45, a lifting guide 46,
A carriage 47 is provided, and the carriage 47 is provided from the transfer passage 20.
The push plate 10 dropped to the upper side is lifted by the carriage 47, carried into the chute 23 and supplied to the billet loader 12 located at the extrusion center retreat position as shown in FIG.

4 to 12 show an example of the press cycle adopted in this embodiment. FIG. 4 shows the initial position. From this state, the billet loader 12 supplies the pusher 10 together with the billet 11 into the container 2 (FIGS. 5 and 6). At the time of extrusion molding, the pusher loader 14 is pivotally set in an unclamped state as shown in FIG. 8. After the tubular product shown in FIG. 9 is extruded, the pusher 10 and the pusher 10 are pushed by moving the container 2 in the extrusion direction. The meal 2a projects from the rear end side of the container 2, and the pusher loader 14 first clamps the pusher 10 and takes it to the extrusion center retracted position (the tenth position).
(Fig.) Next, the lees 2a are cut by the lees cutting shear 9 (Fig. 11).

At this time, the pusher 10 clamped by the pusher loader 14
Is supplied to the pusher chute 17 as described above. Therefore, in this embodiment, as shown in FIG. 3, a plurality of pushers 10 can be circulated in the pusher transfer mechanism T, so that each pusher 10 is cooled during the circulation, It becomes possible to exchange and use every cycle. When it is desired to collect the push board 10 for inspection or repair, the switching means C is used.
By aligning with the storage bucket 26 side, the pusher plate 10 can be collected without entering the press machine. Further, according to the present embodiment, it is needless to say that not only the pressing plate 10 can be exchanged and used every press cycle, but also the press plate 10 can be exchanged and used every several cycles. In addition, while stopping the supply of the pusher 10 to the pusher chute 17, it is possible to inspect and replace the other pushers 10 while repeatedly using one pusher 10 as in the conventional example. In any case, the handling pattern of the press board 10 can be selected almost arbitrarily, and the press work is not interrupted.

The present invention is not limited to the above-described embodiment, and for example, the lift 19 or the elevator 21 depending on the positional relationship between the pusher loader 14 and the billet loader 12 at the push-out center retracted positions.
It may not be necessary to provide.

(Effects of the Invention) According to the present invention, the handling pattern of the press platen such as the circulation type method in which a plurality of press plates 10 are used and exchanged every press cycle, or the exchange use every several press cycles is performed. Almost any choice, so one pusher 10
It is possible to avoid an abnormal temperature rise of the press board 10 due to repeated use of and to improve its durability. Further, the most suitable usage condition of the press platen 10 can be obtained depending on the material of the billet 11 or the extrusion conditions.In particular, the press platen 10 is carried out to one side outside the press machine through the transfer passages 17 and 18, and Since the billet loader 12 disposed on the other side of the machine has a transfer passage 20 extending from one side to the other side across the press machine, the press platen 10 is transferred or transferred during the transfer. It is sufficiently cooled, and it is no longer necessary to interrupt the press work for cooling and collecting the press plate 10.

Further, according to the present invention, when it is desired to collect the pusher 10 when inspecting or repairing the pusher 10, it is possible to automatically collect any number of the pusher 10 outside the press machine, and the entry work into the machine is completely eliminated. It is unnecessary and very safe.

[Brief description of drawings]

1 to 12 show an embodiment according to the present invention.
Figure is a plan view of the indirect extrusion press, Figure 2 is the same side view, and Figure 3
The figure is an explanatory view of the press plate circulation in the same device, and FIGS.
The figure is an explanatory view of a press cycle including handling of a press board. 2 ... container, 3 ... container holder, 4 ... distem,
5 ... Pressure stem, 9 ... Sewer cutting shear, 10 ... Press board, 11 ...
Billet, 12 ... Billet loader, 14 ... Pusher loader, 17 ...
Transfer passage (pusher chute), 18 ... Transfer passage, 20 ... Transfer passage, 26 ... Pusher storage bucket, C ... Pusher path switching means.

Claims (1)

[Scope of utility model registration request] 1. A container (2) capable of advancing and retracting between two stems (4) (5) facing each other, a container holder (3) supporting the container (2), and the container (2). ) Inside the billet
In the press machine between the container (2) and the pressure stem (5), and the billet loader (12) capable of reciprocating between the extrusion center position and the extrusion center retreat position to supply (11). In the container (2), there is a clamp means for the pusher (10) that reciprocates between the extrusion center position and the extrusion center retreat position in
Pusher loader (14) that moves along the extrusion axis as a unit
In the indirect extrusion press, which comprises: Transfer passages (17) (18) for unloading the board (10) to one side outside the press machine are provided, and the transfer path (17) (18) is carried out to the billet loader (12) arranged on the other side outside the press machine. A transfer passage (20) extending across the press machine from one side to the other side for supplying the pressing plate (10) is provided, and the transfer passage (18) or the transfer passage (20) is provided. In the middle of the outside of the press machine, there are two types of pusher that can be selectively selected, one for the billet loader (12) and the other for the pusher storage bucket (26). A board handling device for an indirect extrusion press, characterized in that board path switching means (C) is provided.